日期:2014-05-16 浏览次数:20304 次
package fox.tags.hello; import java.io.IOException; import javax.servlet.jsp.JspException; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.tagext.TagSupport; public class InputTag extends TagSupport{ private String name=""; public void setName(String name) { //set方法必须有 this.name = name; } @Override public int doStartTag() throws JspException { return normalInput(); } private int normalInput(){ JspWriter out=this.pageContext.getOut(); StringBuffer sb=new StringBuffer(""); sb.append("<input type=\"text\" name=\""); sb.append(name); sb.append("\"/>"); try { out.write(sb.toString()); } catch (IOException e) { e.printStackTrace(); } return this.SKIP_BODY; } }
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN" "http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd"> <taglib> <tlib-version>1.0</tlib-version> <jsp-version>1.2</jsp-version> <short-name>shortname</short-name> <tag> <name>hello</name> <tag-class>fox.tags.hello.HelloTag</tag-class> </tag> <tag> <name>einput</name> <tag-class>fox.tags.hello.InputTag</tag-class> <attribute> <name>name</name> <required>false</required> <!-- rtexprvalue的全称是 Run-time Expression Value, 它用于表示是否可以使用JSP表达式. --> <rtexprvalue>true</rtexprvalue> </attribute> </tag> </taglib>
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <jsp-config> <taglib> <taglib-uri>/hello-tags</taglib-uri> <taglib-location>/WEB-INF/tld/hello.tld</taglib-location> </taglib> </jsp-config> </web-app>
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%> <%@ taglib prefix="f" uri="/hello-tags" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <f:hello></f:hello><br/> <f:einput name="myname"></f:einput> </body> </html>